// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
//
// Copyright (C) Hector Martin "marcan" (hector@marcansoft.com)

#include "Core/HW/WiimoteEmu/Encryption.h"

#include <algorithm>

#include "Common/BitUtils.h"
#include "Common/Logging/Log.h"

namespace
{
constexpr u8 sboxes[18][256] = {
    {
        0x70, 0x51, 0x03, 0x86, 0x40, 0x0d, 0x4f, 0xeb, 0x3e, 0xcc, 0xd1, 0x87, 0x35, 0xbd, 0xf5,
        0x0b, 0x5e, 0xd0, 0xf8, 0xf2, 0xd5, 0xe2, 0x6c, 0x31, 0x0c, 0xad, 0xfc, 0x21, 0xc3, 0x78,
        0xc1, 0x06, 0xc2, 0x4c, 0x55, 0xe6, 0x4a, 0x34, 0x48, 0x11, 0x1e, 0xda, 0xe7, 0x1a, 0x84,
        0xa0, 0x96, 0xa7, 0xe3, 0x7f, 0xaf, 0x63, 0x9c, 0xfa, 0x23, 0x5b, 0x79, 0xc8, 0x9e, 0xba,
        0xb2, 0xc9, 0x22, 0x12, 0x4b, 0xb3, 0xa1, 0xb6, 0x32, 0x49, 0xa2, 0xe1, 0x89, 0x39, 0x10,
        0x66, 0xc5, 0x07, 0x8f, 0x54, 0xea, 0x91, 0xca, 0x3f, 0xf9, 0x19, 0xf0, 0xd7, 0x46, 0xbc,
        0x28, 0x1b, 0x61, 0xe8, 0x2f, 0x6a, 0xae, 0x9d, 0xf6, 0x4e, 0x09, 0x14, 0x77, 0x4d, 0xdb,
        0x1f, 0x2e, 0x7b, 0x7c, 0xf1, 0x43, 0xa3, 0x00, 0xb8, 0x13, 0x8c, 0x85, 0xb9, 0x29, 0x75,
        0x88, 0xfd, 0xd2, 0x56, 0x1c, 0x50, 0x97, 0x41, 0xe5, 0x3b, 0x60, 0xb5, 0xc0, 0x64, 0xee,
        0x98, 0xd6, 0x2d, 0x25, 0xa4, 0xaa, 0xcd, 0x7d, 0xa8, 0x83, 0xc6, 0xab, 0xbe, 0x44, 0x99,
        0x26, 0x3c, 0xce, 0x9f, 0xbf, 0xd3, 0xcb, 0x76, 0x7a, 0x7e, 0x82, 0x01, 0x8a, 0x9a, 0x80,
        0x1d, 0x0e, 0xb0, 0x5c, 0xd4, 0x38, 0x62, 0xf4, 0x30, 0xe0, 0x8e, 0x53, 0xb7, 0x02, 0x57,
        0xac, 0xa6, 0x52, 0x0a, 0x6d, 0x92, 0x65, 0x17, 0x24, 0x33, 0x45, 0x72, 0x74, 0xb1, 0xb4,
        0xf7, 0x5d, 0xed, 0x2c, 0xff, 0x47, 0x37, 0x5a, 0x90, 0xbb, 0xdf, 0x2a, 0x16, 0x59, 0x95,
        0xd9, 0xc4, 0x27, 0x67, 0x73, 0xc7, 0x68, 0xfe, 0xa5, 0xdd, 0x6b, 0x5f, 0x93, 0xd8, 0xec,
        0x05, 0x3a, 0x8d, 0x6e, 0xfb, 0x3d, 0xa9, 0x69, 0x36, 0xf3, 0x94, 0xde, 0xef, 0x15, 0x6f,
        0x8b, 0x9b, 0x08, 0x0f, 0xdc, 0x81, 0x18, 0x20, 0x04, 0xe4, 0x71, 0xcf, 0xe9, 0x2b, 0x42,
        0x58,
    },
    {
        0x01, 0xa0, 0xa9, 0x62, 0xd6, 0x3f, 0x85, 0xa7, 0xb6, 0xd4, 0xfa, 0x15, 0x66, 0x17, 0x09,
        0xbd, 0x5d, 0x14, 0x34, 0x26, 0x59, 0x72, 0x91, 0x54, 0x06, 0x4f, 0xf8, 0xb0, 0x5b, 0x74,
        0x93, 0x99, 0x8c, 0xf2, 0x45, 0xcd, 0xea, 0x4e, 0xad, 0x10, 0x4a, 0xe5, 0xca, 0xee, 0xdf,
        0xc6, 0x6f, 0x9f, 0x88, 0x8e, 0x02, 0xcc, 0x08, 0xa8, 0x77, 0x94, 0x6d, 0x21, 0xb1, 0x28,
        0xe4, 0x39, 0x79, 0x96, 0x60, 0x71, 0x81, 0x16, 0x2e, 0xe6, 0x78, 0xb9, 0xc4, 0x46, 0x9a,
        0x42, 0xae, 0xb7, 0x7c, 0x43, 0xb3, 0x22, 0x1a, 0x86, 0xc2, 0x32, 0x3d, 0x2d, 0x9c, 0xd2,
        0x29, 0xe9, 0x63, 0x9b, 0xd1, 0x31, 0x38, 0x5e, 0x1e, 0x36, 0x41, 0xbb, 0x03, 0x18, 0x2b,
        0x3e, 0xbf, 0x68, 0x61, 0xfc, 0x52, 0xc0, 0xde, 0xe0, 0x0a, 0x58, 0x13, 0x5a, 0x00, 0xbe,
        0x1c, 0x90, 0x0e, 0x53, 0x12, 0xfd, 0xe2, 0x6e, 0xba, 0xce, 0x24, 0x27, 0x44, 0x7f, 0x87,
        0xa3, 0xa1, 0xd5, 0x50, 0x40, 0xe3, 0xf9, 0x83, 0xf7, 0xc7, 0xa2, 0x35, 0xc8, 0xdb, 0x19,
        0xab, 0x2f, 0x11, 0x25, 0xed, 0x33, 0x9e, 0x55, 0xe1, 0x48, 0xaf, 0x73, 0x84, 0xda, 0x2a,
        0xaa, 0x51, 0xeb, 0x9d, 0x95, 0xb2, 0xcb, 0xe7, 0x70, 0x80, 0xfe, 0x4c, 0x65, 0x04, 0xef,
        0xc5, 0xf1, 0xc3, 0x3a, 0xb4, 0xf5, 0x5f, 0x23, 0x89, 0xdd, 0x30, 0xa5, 0x8b, 0xd3, 0xf6,
        0xdc, 0x4d, 0x64, 0xd7, 0xf0, 0x8f, 0xec, 0x56, 0x37, 0x5c, 0xa4, 0x0d, 0x07, 0x76, 0x8a,
        0x2c, 0x0b, 0xb5, 0xd8, 0xc1, 0x1f, 0xe8, 0x3b, 0xf4, 0x4b, 0x1b, 0x47, 0x6c, 0x49, 0x67,
        0x7b, 0x92, 0xcf, 0x75, 0x7e, 0x20, 0xd9, 0x7d, 0x3c, 0x97, 0x7a, 0xd0, 0x05, 0x6b, 0x0f,
        0x1d, 0xfb, 0x82, 0x98, 0x57, 0x8d, 0xf3, 0x6a, 0xbc, 0xac, 0xc9, 0xa6, 0xff, 0xb8, 0x69,
        0x0c,
    },
    {
        0x4c, 0x4d, 0x72, 0x07, 0x5a, 0x49, 0x33, 0x8d, 0xa2, 0xab, 0x46, 0x3d, 0x63, 0x0d, 0xa0,
        0x97, 0xff, 0xf0, 0xf5, 0xfa, 0xc0, 0xe9, 0xdb, 0x62, 0xe4, 0xe1, 0x74, 0x43, 0xdc, 0x86,
        0x18, 0x29, 0x37, 0xf4, 0x06, 0xe2, 0xed, 0x6f, 0x90, 0x48, 0x1e, 0x2d, 0x1d, 0xea, 0x73,
        0x94, 0x54, 0xdf, 0x25, 0xf6, 0x47, 0x27, 0xd9, 0x11, 0x77, 0xc9, 0x84, 0x1c, 0x5b, 0x5c,
        0x51, 0x81, 0xa6, 0x22, 0x3e, 0x24, 0x96, 0xc8, 0x8a, 0xec, 0x82, 0x7c, 0x09, 0xb8, 0x45,
        0x4a, 0x57, 0xbb, 0x2f, 0x50, 0x75, 0x8e, 0x61, 0x70, 0x8c, 0x6c, 0xaf, 0xd0, 0xfd, 0xb4,
        0x1b, 0xae, 0xde, 0xfe, 0x3b, 0xb5, 0x36, 0xbd, 0x55, 0x01, 0x0e, 0x9c, 0x41, 0x56, 0x5f,
        0xb3, 0x26, 0x03, 0x83, 0xba, 0x13, 0x4b, 0xca, 0xc5, 0x0a, 0xf8, 0x60, 0xa5, 0xb9, 0xc7,
        0xc3, 0x98, 0x32, 0xfb, 0x12, 0xf9, 0xa7, 0x92, 0xaa, 0x68, 0xf3, 0x78, 0x7e, 0x05, 0x20,
        0x21, 0x02, 0xe8, 0xbf, 0xf2, 0xb0, 0x59, 0x8f, 0xd2, 0xcb, 0x87, 0x65, 0x15, 0xf1, 0x1a,
        0xb2, 0x30, 0xad, 0xee, 0x58, 0xa3, 0x8b, 0x66, 0x1f, 0x2c, 0xd7, 0x5d, 0x19, 0x85, 0xa8,
        0xe6, 0xd3, 0x6b, 0xa1, 0x0c, 0x91, 0x93, 0x6a, 0x5e, 0x0b, 0x79, 0xe3, 0xdd, 0x00, 0x4f,
        0x3c, 0x89, 0x6e, 0x71, 0x69, 0xa9, 0xac, 0x40, 0xe5, 0x99, 0x28, 0xc6, 0x31, 0x4e, 0x7a,
        0xcd, 0x08, 0x9e, 0x7d, 0xef, 0x17, 0xfc, 0x88, 0xd8, 0xa4, 0x6d, 0x44, 0x95, 0xd1, 0xb7,
        0xd4, 0x9b, 0xbe, 0x2a, 0x34, 0x64, 0x2b, 0xcf, 0x2e, 0xeb, 0x38, 0xce, 0x23, 0xe0, 0x3a,
        0x3f, 0xf7, 0x7b, 0x9f, 0x10, 0x53, 0xbc, 0x52, 0x67, 0x16, 0xe7, 0x80, 0x76, 0x04, 0xc4,
        0xb6, 0xc1, 0xc2, 0x7f, 0x9a, 0xda, 0xd5, 0x39, 0x42, 0x14, 0x9d, 0xb1, 0x0f, 0x35, 0xd6,
        0xcc,
    },
    {
        0xb9, 0xda, 0x38, 0x0c, 0xa2, 0x9c, 0x09, 0x1f, 0x06, 0xb1, 0xb6, 0xfd, 0x1a, 0x69, 0x23,
        0x30, 0xc4, 0xde, 0x01, 0xd1, 0xf4, 0x58, 0x29, 0x37, 0x1c, 0x7d, 0xd5, 0xbf, 0xff, 0xbd,
        0xc8, 0xc9, 0xcf, 0x65, 0xbe, 0x7b, 0x78, 0x97, 0x98, 0x67, 0x08, 0xb3, 0x26, 0x57, 0xf7,
        0xfa, 0x40, 0xad, 0x8e, 0x75, 0xa6, 0x7c, 0xdb, 0x91, 0x8b, 0x51, 0x99, 0xd4, 0x17, 0x7a,
        0x90, 0x8d, 0xce, 0x63, 0xcb, 0x4e, 0xa0, 0xab, 0x18, 0x3a, 0x5b, 0x50, 0x7f, 0x21, 0x74,
        0xc1, 0xbb, 0xb8, 0xb7, 0xba, 0x0b, 0x35, 0x95, 0x31, 0x59, 0x9a, 0x4d, 0x04, 0x07, 0x1e,
        0x5a, 0x76, 0x13, 0xf3, 0x71, 0x83, 0xf0, 0x86, 0x03, 0xa8, 0x39, 0x42, 0xaa, 0x28, 0xe6,
        0xe4, 0xd8, 0x5d, 0xd3, 0xd0, 0x6e, 0x6f, 0x96, 0xfb, 0x5e, 0xbc, 0x56, 0xc2, 0x5f, 0x85,
        0x9b, 0xe7, 0xaf, 0xd2, 0x3b, 0x84, 0x6a, 0xa7, 0x53, 0xc5, 0x44, 0x49, 0xa5, 0xf9, 0x36,
        0x72, 0x3d, 0x2c, 0xd9, 0x1b, 0xa1, 0xf5, 0x4f, 0x93, 0x9d, 0x68, 0x47, 0x41, 0x16, 0xca,
        0x2a, 0x4c, 0xa3, 0x87, 0xd6, 0xe5, 0x19, 0x2e, 0x77, 0x15, 0x6d, 0x70, 0xc0, 0xdf, 0xb2,
        0x00, 0x46, 0xed, 0xc6, 0x6c, 0x43, 0x60, 0x92, 0x2d, 0xa9, 0x22, 0x45, 0x8f, 0x34, 0x55,
        0xae, 0xa4, 0x0a, 0x66, 0x32, 0xe0, 0xdc, 0x02, 0xac, 0xe8, 0x20, 0x8c, 0x89, 0x62, 0x4a,
        0xfe, 0xee, 0xc3, 0xe3, 0x3c, 0xf1, 0x79, 0x05, 0xe9, 0xf6, 0x27, 0x33, 0xcc, 0xf2, 0x9e,
        0x11, 0x81, 0x7e, 0x80, 0x10, 0x8a, 0x82, 0x9f, 0x48, 0x0d, 0xd7, 0xb4, 0xfc, 0x2f, 0xb5,
        0xc7, 0xdd, 0x88, 0x14, 0x6b, 0x2b, 0x54, 0xea, 0x1d, 0x94, 0x5c, 0xb0, 0xef, 0x12, 0x24,
        0xcd, 0xeb, 0xe1, 0xe2, 0x64, 0x73, 0x3f, 0x0e, 0x52, 0x61, 0x25, 0x3e, 0xf8, 0x0f, 0x4b,
        0xec,
    },
    {
        0xc0, 0x00, 0x30, 0xf6, 0x02, 0x49, 0x3d, 0x10, 0x6e, 0x20, 0xc9, 0xa6, 0x2f, 0xfe, 0x2c,
        0x2b, 0x75, 0x2e, 0x45, 0x26, 0xab, 0x48, 0xa9, 0x80, 0xfc, 0x04, 0xcc, 0xd3, 0xb5, 0xba,
        0xa3, 0x38, 0x31, 0x7d, 0x01, 0xd9, 0xa7, 0x7b, 0x96, 0xb6, 0x63, 0x69, 0x4e, 0xf7, 0xde,
        0xe0, 0x78, 0xca, 0x50, 0xaa, 0x41, 0x91, 0x65, 0x88, 0xe4, 0x21, 0x85, 0xda, 0x3a, 0x27,
        0xbe, 0x1c, 0x3e, 0x42, 0x5e, 0x17, 0x52, 0x7f, 0x1f, 0x89, 0x24, 0x6f, 0x8f, 0x5c, 0x67,
        0x74, 0x0e, 0x12, 0x87, 0x8d, 0xe9, 0x34, 0xed, 0x73, 0xc4, 0xf8, 0x61, 0x5b, 0x05, 0xdf,
        0x59, 0x4c, 0x97, 0x79, 0x83, 0x18, 0xa4, 0x55, 0x95, 0xeb, 0xbd, 0x53, 0xf5, 0xf1, 0x57,
        0x66, 0x46, 0x9f, 0xb2, 0x81, 0x09, 0x51, 0x86, 0x22, 0x16, 0xdd, 0x23, 0x93, 0x76, 0x29,
        0xc2, 0xd7, 0x1d, 0xd4, 0xbf, 0x36, 0x3f, 0xea, 0x4b, 0x11, 0x32, 0xb9, 0x62, 0x54, 0x60,
        0xd6, 0x6d, 0x43, 0x9a, 0x0d, 0x92, 0x9c, 0xb0, 0xef, 0x58, 0x6c, 0x9d, 0x77, 0x2d, 0x70,
        0xfa, 0xf3, 0xb3, 0x0b, 0xe2, 0x40, 0x7e, 0xf4, 0x8a, 0xe5, 0x8c, 0x3c, 0x56, 0x71, 0xd1,
        0x64, 0xe1, 0x82, 0x0a, 0xcb, 0x13, 0x15, 0x90, 0xec, 0x03, 0x99, 0xaf, 0x14, 0x5d, 0x0f,
        0x33, 0x4a, 0x94, 0xa5, 0xa8, 0x35, 0x1b, 0xe3, 0x6a, 0xc6, 0x28, 0xff, 0x4d, 0xe7, 0x25,
        0x84, 0xac, 0x08, 0xae, 0xc5, 0xa2, 0x2a, 0xb8, 0x37, 0x0c, 0x7a, 0xa0, 0xc3, 0xce, 0xad,
        0x06, 0x1a, 0x9e, 0x8b, 0xfb, 0xd5, 0xf0, 0xc1, 0x1e, 0xd0, 0xb4, 0x9b, 0xb1, 0x44, 0xf2,
        0x47, 0xc7, 0x68, 0xcf, 0x72, 0xbb, 0x4f, 0x5a, 0xf9, 0xdc, 0x6b, 0xdb, 0xd2, 0xe8, 0x7c,
        0xc8, 0xee, 0x98, 0xa1, 0xe6, 0xd8, 0x39, 0x07, 0x5f, 0xfd, 0x8e, 0x19, 0xb7, 0x3b, 0xbc,
        0xcd,
    },
    {
        0x7c, 0xe3, 0x81, 0x73, 0xb2, 0x11, 0xbf, 0x6f, 0x20, 0x98, 0xfe, 0x75, 0x96, 0xef, 0x6c,
        0xda, 0x50, 0xe1, 0x09, 0x72, 0x54, 0x45, 0xba, 0x34, 0x80, 0x5b, 0xed, 0x3e, 0x53, 0x2c,
        0x87, 0xa4, 0x57, 0xf3, 0x33, 0x3f, 0x3c, 0xb7, 0x67, 0xb4, 0xa3, 0x25, 0x60, 0x4f, 0x07,
        0x6b, 0x1b, 0x47, 0x15, 0x0f, 0xe4, 0x0a, 0xea, 0xd1, 0x32, 0x78, 0x36, 0x49, 0x8d, 0x4b,
        0xd2, 0xbc, 0xa5, 0xdc, 0x1d, 0x0d, 0x4d, 0xcd, 0x9a, 0x82, 0x5f, 0xfc, 0x94, 0x65, 0xbe,
        0xe2, 0xf4, 0xc9, 0x1e, 0x44, 0xcb, 0x9e, 0x0c, 0x64, 0x71, 0x26, 0x63, 0xb3, 0x14, 0xe8,
        0x40, 0x70, 0x8a, 0x0e, 0x19, 0x42, 0x6d, 0xac, 0x88, 0x10, 0x5c, 0xdf, 0x41, 0xa9, 0xad,
        0xe5, 0xfb, 0x74, 0xcc, 0xd5, 0x06, 0x8e, 0x59, 0x86, 0xce, 0x1f, 0x3d, 0x76, 0xe0, 0x8f,
        0xb9, 0x77, 0x27, 0x7b, 0xa6, 0xd8, 0x29, 0xd3, 0xec, 0xb8, 0x13, 0xf7, 0xfa, 0xc3, 0x51,
        0x6a, 0xde, 0x4a, 0x5a, 0xeb, 0xc2, 0x8b, 0x23, 0x48, 0x92, 0xcf, 0x62, 0xa8, 0x99, 0xf8,
        0xd0, 0x2e, 0x85, 0x61, 0x43, 0xc8, 0xbd, 0xf0, 0x05, 0x93, 0xca, 0x4e, 0xf1, 0x7d, 0x30,
        0xfd, 0xc4, 0x69, 0x66, 0x2f, 0x08, 0xb1, 0x52, 0xf9, 0x21, 0xe6, 0x7a, 0x2b, 0xdd, 0x39,
        0x84, 0xff, 0xc0, 0x91, 0xd6, 0x37, 0xd4, 0x7f, 0x2d, 0x9b, 0x5d, 0xa1, 0x3b, 0x6e, 0xb5,
        0xc5, 0x46, 0x04, 0xf5, 0x90, 0xee, 0x7e, 0x83, 0x1c, 0x03, 0x56, 0xb6, 0xaa, 0x00, 0x17,
        0x01, 0x35, 0x55, 0x79, 0x0b, 0x12, 0xbb, 0x1a, 0x31, 0xe7, 0x02, 0x28, 0x16, 0xc1, 0xf6,
        0xa2, 0xdb, 0x18, 0x9c, 0x89, 0x68, 0x38, 0x97, 0xab, 0xc7, 0x2a, 0xd7, 0x3a, 0xf2, 0xc6,
        0x24, 0x4c, 0xb0, 0x58, 0xa0, 0x22, 0x5e, 0x9d, 0xd9, 0xa7, 0xe9, 0xae, 0xaf, 0x8c, 0x95,
        0x9f,
    },
    {
        0x28, 0xb7, 0x20, 0xd7, 0xb0, 0x30, 0xc3, 0x09, 0x19, 0xc0, 0x67, 0xd6, 0x00, 0x3c, 0x7e,
        0xe7, 0xe9, 0xf4, 0x08, 0x5a, 0xf8, 0xb8, 0x2e, 0x05, 0xa6, 0x25, 0x9e, 0x5c, 0xd8, 0x15,
        0x0d, 0xe1, 0xf6, 0x11, 0x54, 0x6b, 0xcd, 0x21, 0x46, 0x66, 0x5e, 0x84, 0xad, 0x06, 0x38,
        0x29, 0x44, 0xc5, 0xa2, 0xce, 0xf1, 0xaa, 0xc1, 0x40, 0x71, 0x86, 0xb5, 0xef, 0xfc, 0x36,
        0xa8, 0xcb, 0x0a, 0x48, 0x27, 0x45, 0x64, 0xa3, 0xaf, 0x8c, 0xb2, 0xc6, 0x9f, 0x07, 0x89,
        0xdc, 0x17, 0xd3, 0x49, 0x79, 0xfb, 0xfe, 0x1d, 0xd0, 0xb9, 0x88, 0x43, 0x52, 0xbc, 0x01,
        0x78, 0x2b, 0x7d, 0x94, 0xc7, 0x0e, 0xde, 0xa5, 0xd5, 0x9b, 0xcc, 0xf7, 0x61, 0x7a, 0xc2,
        0x74, 0x81, 0x39, 0x03, 0xab, 0x96, 0xa0, 0x37, 0xbd, 0x2d, 0x72, 0x75, 0x3f, 0xc9, 0xd4,
        0x8e, 0x6f, 0xf9, 0x8d, 0xed, 0x62, 0xdb, 0x1c, 0xdf, 0x04, 0xac, 0x1b, 0x6c, 0x14, 0x4b,
        0x63, 0xf0, 0xbf, 0xb4, 0x82, 0xec, 0x7b, 0x1a, 0x59, 0x92, 0xd2, 0x10, 0x60, 0xb6, 0x3d,
        0x5f, 0xe6, 0x80, 0x6e, 0x70, 0xc4, 0xf2, 0x35, 0xd9, 0x7c, 0xee, 0xe5, 0x41, 0xa4, 0x5b,
        0x50, 0xdd, 0xbb, 0x4c, 0xf3, 0x1f, 0x9d, 0x5d, 0x57, 0x55, 0x51, 0x97, 0xe3, 0x58, 0x42,
        0x4d, 0x9c, 0x73, 0xba, 0xc8, 0x77, 0x31, 0x69, 0x26, 0xae, 0xea, 0x8a, 0xda, 0x22, 0xb3,
        0x87, 0x56, 0xfa, 0x93, 0x0b, 0x34, 0x16, 0x33, 0xe8, 0xe4, 0x53, 0xbe, 0xa9, 0xb1, 0x3a,
        0x3e, 0xf5, 0x90, 0x6a, 0xcf, 0x3b, 0x12, 0xfd, 0x8f, 0x9a, 0xa7, 0x47, 0x91, 0x99, 0xeb,
        0x0f, 0x24, 0xff, 0x23, 0x18, 0x85, 0x4e, 0x7f, 0x0c, 0xe0, 0xa1, 0xe2, 0xd1, 0x2c, 0x2a,
        0x4a, 0x02, 0x4f, 0x1e, 0x95, 0x68, 0x8b, 0x98, 0x83, 0x6d, 0x76, 0xca, 0x65, 0x32, 0x13,
        0x2f,
    },
    {
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        0xb3, 0xec, 0x39, 0x05, 0x2d, 0x28, 0x10, 0xb1, 0xc6, 0xfe, 0x70, 0x29, 0x5a, 0xfb, 0x49,
        0x23, 0xdd, 0x86, 0x01, 0xe5, 0xd4, 0x25, 0x42, 0xae, 0x85, 0x75, 0xff, 0x68, 0x2e, 0x5c,
        0x1f, 0x02, 0xba, 0xb5, 0xbf, 0x7c, 0xfd, 0x71, 0xf9, 0x8e, 0x5f, 0xb8, 0x0e, 0x0f, 0xc3,
        0x1a, 0xbb, 0xd8, 0xaa, 0xf3, 0xc7, 0xa9, 0x43, 0x20, 0xc6, 0xd0, 0xf4, 0x07, 0x00, 0x9f,
        0x89, 0x8e, 0xba, 0xe0, 0x5a, 0x24, 0x1f, 0x2a, 0xdd, 0xd4, 0xe3, 0x0d, 0xb0, 0xed, 0xbe,
        0xb2, 0x2b, 0x75, 0x2e, 0x66, 0x17, 0x6e, 0x7c, 0x52, 0x76, 0x91, 0x01, 0x59, 0x61, 0x3c,
        0x86, 0x2c, 0xfd, 0x2d, 0xf6, 0x0b, 0xab, 0xe5, 0x22, 0x41, 0x67, 0x72, 0xc2, 0xad, 0xbd,
        0xfe, 0x96, 0xfa, 0x7b, 0x9e, 0x40, 0x5f, 0x71, 0x98, 0x4c, 0x88, 0xfb, 0xeb, 0x6b, 0xc9,
        0xce, 0xbb, 0xc0, 0x03, 0x5b, 0x3a, 0xae, 0x15, 0x3e, 0x56, 0x4d, 0xd8, 0x3b, 0x50, 0x35,
        0x84, 0x97, 0x34, 0xc4, 0x54, 0xcc, 0x4e, 0x5e, 0xcd, 0xe6, 0x68, 0x4f, 0xb3, 0xb4, 0x9d,
        0x5d, 0xa5, 0xa3, 0x78, 0xe9, 0x38, 0x7e, 0x08, 0x60, 0x6c, 0xdb, 0x7f, 0xbf, 0x82, 0x30,
        0xe2, 0x48, 0x19, 0x6d, 0x1a, 0xa2, 0xdf, 0x58, 0x95, 0x69, 0x51, 0x31, 0xda, 0x0c, 0x4b,
        0xa4, 0x0a, 0x45, 0x27, 0xd7, 0x1e, 0x65, 0x87, 0x1b, 0xb7, 0xb5, 0x42, 0x8c, 0x26, 0x6f,
        0x25, 0xea, 0xfc, 0xef, 0x8a, 0xa7, 0x10, 0xbc, 0xf5, 0xa0, 0x21, 0x44, 0x57, 0x02, 0xd2,
        0x2f, 0x63, 0x3d, 0xd5, 0x79, 0x9c, 0x05, 0xf2, 0xe4, 0xcf, 0x29, 0xf1, 0x53, 0x0e, 0x7a,
        0xb1, 0x14, 0x12, 0xf9, 0xf7, 0x11, 0x8b, 0x36, 0xa6, 0xb6, 0xd6, 0xa1, 0x18, 0x39, 0xec,
        0x04, 0xc1, 0xe8, 0x8d, 0x28, 0x99, 0x73, 0x90, 0x70, 0xd3, 0x1d, 0x8f, 0xcb, 0xf8, 0xf0,
        0xb9,
    },
    {
        0xde, 0x77, 0x92, 0x32, 0xe7, 0xee, 0x85, 0x33, 0x13, 0xa8, 0x9a, 0x3f, 0xc8, 0xe1, 0x80,
        0x9b, 0x06, 0x23, 0x37, 0x09, 0xd1, 0xff, 0xac, 0x81, 0x94, 0x64, 0xaf, 0x4a, 0x46, 0x7d,
        0x16, 0xc3, 0x55, 0x47, 0xca, 0xd9, 0x0f, 0x1c, 0x6a, 0x74, 0xdc, 0x49, 0x83, 0xc5, 0xb8,
        0x5c, 0x93, 0x62, 0xdc, 0x2f, 0xd4, 0xf0, 0x86, 0x18, 0xb1, 0x8c, 0x4f, 0xb9, 0xd5, 0x97,
        0x1b, 0x43, 0x4c, 0x1d, 0xea, 0x5b, 0xc3, 0x11, 0x82, 0xfc, 0xa2, 0x4a, 0xa0, 0x7f, 0x47,
        0xaf, 0xa3, 0x0a, 0x59, 0xad, 0xe5, 0x06, 0x2a, 0x4e, 0x6e, 0xe3, 0x40, 0xdb, 0x53, 0x83,
        0x49, 0xb4, 0xba, 0x71, 0x95, 0x9b, 0x51, 0xb3, 0xac, 0xd1, 0xae, 0xc4, 0xcf, 0x4b, 0x4d,
        0x69, 0x16, 0xec, 0x0b, 0xa5, 0x91, 0x73, 0x07, 0x3b, 0x19, 0x84, 0xc2, 0x6d, 0x8d, 0xb2,
        0xbd, 0x25, 0x48, 0x96, 0xc5, 0x20, 0x1a, 0xa1, 0x8b, 0xc6, 0xe1, 0x3f, 0x28, 0xa7, 0xe7,
        0x12, 0x76, 0xb0, 0x1c, 0x8e, 0xd0, 0x45, 0x90, 0xca, 0x98, 0xd6, 0xa6, 0x36, 0x32, 0x72,
        0x8a, 0xa8, 0x0d, 0x3a, 0x9f, 0x37, 0x3c, 0x89, 0xdd, 0x67, 0x22, 0x81, 0xe9, 0x15, 0x41,
        0x42, 0xf5, 0x2e, 0x66, 0xd2, 0x61, 0x80, 0x0f, 0x54, 0x93, 0xaa, 0xed, 0x5d, 0xe4, 0x7d,
        0x30, 0xc9, 0x3d, 0xe0, 0xe2, 0x26, 0xf2, 0x08, 0xa9, 0x63, 0x24, 0x2d, 0x8f, 0x79, 0x9c,
        0xda, 0xbf, 0x55, 0x62, 0x5c, 0x00, 0xb6, 0x27, 0x6a, 0x0e, 0x92, 0x01, 0xd7, 0xff, 0xeb,
        0x1f, 0x74, 0x14, 0x99, 0xf7, 0x44, 0x87, 0x33, 0x6c, 0x94, 0x13, 0x50, 0x75, 0x68, 0x10,
        0x17, 0xbb, 0x2c, 0x6b, 0x04, 0xdf, 0xbc, 0x35, 0x6f, 0xb7, 0xf1, 0x57, 0xc1, 0xe6, 0x7c,
        0xb8, 0x77, 0x65, 0x3e, 0x5f, 0xd3, 0x64, 0xcb, 0x02, 0x1e, 0x38, 0xab, 0x88, 0x60, 0x5e,
        0x9d,
    },
    {
        0xbe, 0xc8, 0xa4, 0xd8, 0x52, 0x7b, 0x29, 0xf4, 0x05, 0x70, 0xce, 0x78, 0x85, 0x39, 0x23,
        0xf3, 0x34, 0x58, 0x9e, 0xfb, 0x31, 0xcc, 0x46, 0xef, 0x9a, 0x5a, 0xfe, 0x7a, 0x56, 0xfd,
        0xee, 0xde, 0x0c, 0xf9, 0xcd, 0xc0, 0x2b, 0xd9, 0xb5, 0x09, 0xf6, 0xc7, 0x21, 0xfa, 0xf8,
        0x03, 0xe8, 0x7e, 0x9f, 0xbd, 0x79, 0x91, 0xcc, 0x78, 0x7f, 0xd5, 0x1b, 0xee, 0xbb, 0xb7,
        0xdc, 0xed, 0x6d, 0x9b, 0xef, 0x58, 0xfb, 0x5d, 0x67, 0x69, 0x1f, 0x4e, 0xaf, 0x62, 0x4b,
        0xb8, 0xa8, 0xae, 0x08, 0x60, 0x8c, 0xad, 0x24, 0xa1, 0x48, 0x2f, 0x8a, 0x00, 0x90, 0xb1,
        0x53, 0x07, 0x26, 0x12, 0x72, 0x9d, 0x56, 0x1c, 0x51, 0x34, 0x46, 0x2e, 0x81, 0xcf, 0xb3,
        0xf3, 0x37, 0xf1, 0xfa, 0x3c, 0xba, 0x06, 0x54, 0x85, 0x14, 0x59, 0x36, 0x5e, 0xa5, 0x55,
        0x0c, 0x52, 0x89, 0xcb, 0x97, 0xe2, 0x3b, 0x11, 0xbe, 0xd9, 0x1d, 0xfc, 0x13, 0x7d, 0xa0,
        0x05, 0x41, 0xc3, 0xc5, 0xfd, 0x76, 0x33, 0x82, 0xcd, 0x88, 0x16, 0x1a, 0x29, 0x87, 0x1e,
        0x40, 0x6f, 0xe8, 0x03, 0x3a, 0x50, 0xa6, 0xe4, 0xf4, 0x4f, 0xd6, 0x98, 0x39, 0x71, 0xd0,
        0xf2, 0xf0, 0x3e, 0xea, 0x8d, 0x2c, 0xa2, 0xa9, 0x57, 0x0b, 0x8b, 0x0d, 0xaa, 0xe9, 0x31,
        0xc2, 0x35, 0x5c, 0xd1, 0x38, 0xff, 0x01, 0xa7, 0xec, 0x80, 0xf9, 0x23, 0xdf, 0x30, 0xeb,
        0x2a, 0xb0, 0x17, 0xd2, 0x19, 0x6e, 0xda, 0x25, 0x9e, 0xb6, 0x4c, 0xc6, 0x93, 0xdb, 0x75,
        0x6b, 0x3f, 0x15, 0x73, 0xfe, 0x3d, 0x65, 0x66, 0xb5, 0x7a, 0x9a, 0x32, 0xca, 0x68, 0x8e,
        0x22, 0xc0, 0x44, 0x43, 0xa3, 0x0e, 0x21, 0xb9, 0x02, 0x4d, 0xc8, 0xb4, 0x0a, 0xf6, 0xd3,
        0x45, 0x96, 0x5a, 0x84, 0x70, 0x18, 0xd4, 0xbf, 0xc4, 0xa4, 0x9c, 0xc1, 0xe0, 0x47, 0xc7,
        0xe5,
    },
    {
        0xe6, 0x7e, 0x63, 0xdd, 0x6a, 0xce, 0x28, 0x94, 0xe7, 0x10, 0xbc, 0x5f, 0x04, 0x64, 0x2d,
        0x8f, 0x6c, 0xf7, 0x2b, 0x92, 0x83, 0xd8, 0x99, 0xe3, 0xde, 0xd7, 0x5b, 0xab, 0x4a, 0x74,
        0x77, 0xc9, 0xf5, 0x7b, 0x0f, 0x20, 0xf8, 0x61, 0x42, 0x86, 0x7c, 0x49, 0x95, 0xac, 0x27,
        0xe1, 0x09, 0xb2, 0x0b, 0xd3, 0x6f, 0x0a, 0x39, 0x77, 0x21, 0x17, 0x8f, 0xc7, 0xd5, 0xe5,
        0xb5, 0xb9, 0x11, 0xa4, 0xdc, 0xa3, 0xcd, 0xbb, 0x1a, 0x81, 0x8a, 0xb7, 0xd9, 0x5b, 0x47,
        0x61, 0x8e, 0x88, 0xb8, 0x0c, 0x3b, 0x3a, 0x9a, 0x54, 0xfd, 0x2d, 0x53, 0xb4, 0xc3, 0x5f,
        0x69, 0x60, 0xb1, 0xab, 0x26, 0x56, 0x83, 0x7e, 0xb3, 0x3d, 0x4a, 0x0d, 0x5a, 0x1d, 0x1e,
        0x59, 0xd6, 0x35, 0x8c, 0xf3, 0x9b, 0x18, 0x66, 0xbf, 0xe2, 0x62, 0x92, 0x7b, 0xff, 0x2e,
        0x5c, 0xcf, 0x25, 0xc4, 0xaf, 0xd2, 0x29, 0x63, 0xa5, 0xb2, 0xf9, 0x6a, 0xc1, 0xfb, 0x14,
        0x87, 0x55, 0x73, 0x2c, 0x44, 0x31, 0x79, 0xf4, 0x2a, 0x41, 0x01, 0x24, 0x80, 0x19, 0x65,
        0x4d, 0x9d, 0x9c, 0xe8, 0x13, 0xa2, 0xc0, 0xc5, 0xfe, 0x6b, 0xce, 0x50, 0xf8, 0x04, 0x48,
        0xa8, 0x06, 0x16, 0xbe, 0x67, 0xba, 0xea, 0xc6, 0x0f, 0xd7, 0x74, 0x85, 0xb6, 0xd8, 0x0e,
        0x4c, 0x93, 0x15, 0xbd, 0xe6, 0x78, 0x03, 0x05, 0x32, 0xf7, 0x34, 0xe4, 0xad, 0x30, 0x98,
        0xa1, 0x27, 0x9e, 0xf6, 0x43, 0x64, 0x3c, 0x49, 0xbc, 0xf0, 0x99, 0xdd, 0x12, 0xd1, 0xc9,
        0x5d, 0x7c, 0x22, 0x75, 0x1f, 0x28, 0x2f, 0x09, 0xc2, 0x84, 0x6d, 0xfa, 0x23, 0x3f, 0x7d,
        0x91, 0x89, 0x82, 0x86, 0x58, 0xdf, 0x76, 0xe9, 0xaa, 0xdb, 0xac, 0x2b, 0xf5, 0x90, 0x42,
        0x20, 0xe1, 0xa0, 0xed, 0xd4, 0x52, 0x10, 0xef, 0x3e, 0xe3, 0x1c, 0xda, 0x96, 0xb0, 0x72,
        0x38,
    },
};

}  // namespace

namespace WiimoteEmu
{
void EncryptionKey::GenerateTables(const RandData& rand, const KeyData& key, const u32 idx,
                                   const u8 offset)
{
  ft[0] = sboxes[idx][key[4] + offset] ^ sboxes[idx + 1][rand[3] + offset];
  ft[1] = sboxes[idx][key[2] + offset] ^ sboxes[idx + 1][rand[5] + offset];
  ft[2] = sboxes[idx][key[5] + offset] ^ sboxes[idx + 1][rand[7] + offset];
  ft[3] = sboxes[idx][key[0] + offset] ^ sboxes[idx + 1][rand[2] + offset];
  ft[4] = sboxes[idx][key[1] + offset] ^ sboxes[idx + 1][rand[4] + offset];
  ft[5] = sboxes[idx][key[3] + offset] ^ sboxes[idx + 1][rand[9] + offset];
  ft[6] = sboxes[idx][rand[0] + offset] ^ sboxes[idx + 1][rand[6] + offset];
  ft[7] = sboxes[idx][rand[1] + offset] ^ sboxes[idx + 1][rand[8] + offset];

  sb[0] = sboxes[idx][key[0] + offset] ^ sboxes[idx + 1][rand[1] + offset];
  sb[1] = sboxes[idx][key[5] + offset] ^ sboxes[idx + 1][rand[4] + offset];
  sb[2] = sboxes[idx][key[3] + offset] ^ sboxes[idx + 1][rand[0] + offset];
  sb[3] = sboxes[idx][key[2] + offset] ^ sboxes[idx + 1][rand[9] + offset];
  sb[4] = sboxes[idx][key[4] + offset] ^ sboxes[idx + 1][rand[7] + offset];
  sb[5] = sboxes[idx][key[1] + offset] ^ sboxes[idx + 1][rand[8] + offset];
  sb[6] = sboxes[idx][rand[3] + offset] ^ sboxes[idx + 1][rand[5] + offset];
  sb[7] = sboxes[idx][rand[2] + offset] ^ sboxes[idx + 1][rand[6] + offset];
}

// Generate key from the 0x40-0x4f data in the extension register.
EncryptionKey KeyGen::GenerateFromExtensionKeyData(const ExtKeyData& ext_key) const
{
  EncryptionKey::RandData rand;
  std::copy_n(ext_key.begin(), rand.size(), rand.rbegin());

  EncryptionKey::KeyData key;
  std::copy_n(ext_key.begin() + rand.size(), key.size(), key.rbegin());

  // The "key" is generated from "rand" and "idx".
  // The tables are generated from "rand" "key" and "idx".
  // But "idx" is not sent to the extension.
  // We brute force which "idx" (0-6) the Wii used to generate its "key".
  for (u32 idx = 0; idx != 7; ++idx)
  {
    if (GenerateKeyData(rand, idx) == key)
      return GenerateTables(rand, key, idx);
  }

  // Some homebrew apparently sends "ext_key" filled with 0x00.
  // On a real extension this produces tables filled with 0x17 or 0x97 (same effect).
  // This is not something that the Wii's algorithm is capable of and our brute force will fail.
  WARN_LOG(WIIMOTE, "Extension key generation failed. Filling tables with 0x17.");

  // There must be some not understood math behind the extension's table generation.

  EncryptionKey result;
  result.ft.fill(0x17);
  result.sb.fill(0x17);
  return result;
}

EncryptionKey::KeyData KeyGen1stParty::GenerateKeyData(const EncryptionKey::RandData& rand,
                                                       const u32 idx) const
{
  constexpr u8 ans_tbl[7][6] = {
      {0xa8, 0x77, 0xa6, 0xe0, 0xf7, 0x43}, {0x5a, 0x35, 0x85, 0xe2, 0x72, 0x97},
      {0x8f, 0xb7, 0x1a, 0x62, 0x87, 0x38}, {0x0d, 0x67, 0xc7, 0xbe, 0x4f, 0x3e},
      {0x20, 0x76, 0x37, 0x8f, 0x68, 0xb7}, {0xa9, 0x26, 0x3f, 0x2b, 0x10, 0xe3},
      {0x30, 0x7e, 0x90, 0x0e, 0x85, 0x0a},
  };

  auto& ans = ans_tbl[idx];

  auto& sbox = sboxes[0];

  EncryptionKey::RandData t0;
  for (std::size_t i = 0; i != t0.size(); ++i)
    t0[i] = sbox[rand[i]];

  auto& ror8 = Common::RotateRight<u8>;

  return {
      u8((ror8(ans[0] ^ t0[5], t0[2]) - t0[9]) ^ t0[4]),
      u8((ror8(ans[1] ^ t0[1], t0[0]) - t0[5]) ^ t0[7]),
      u8((ror8(ans[2] ^ t0[6], t0[8]) - t0[2]) ^ t0[0]),
      u8((ror8(ans[3] ^ t0[4], t0[7]) - t0[3]) ^ t0[2]),
      u8((ror8(ans[4] ^ t0[1], t0[6]) - t0[3]) ^ t0[4]),
      u8((ror8(ans[5] ^ t0[7], t0[8]) - t0[5]) ^ t0[9]),
  };
}

EncryptionKey::KeyData KeyGen3rdParty::GenerateKeyData(const EncryptionKey::RandData& rand,
                                                       const u32 idx) const
{
  auto& sbox = sboxes[9];

  EncryptionKey::RandData t0;
  for (std::size_t i = 0; i != t0.size(); ++i)
    t0[i] = sbox[rand[i] + 0x30];

  const auto ans = &sbox[idx * 6];

  auto& rol8 = Common::RotateLeft<u8>;

  return {
      u8(t0[7] ^ t0[6] + rol8(ans[0] ^ t0[0], t0[1])),
      u8(t0[1] ^ t0[3] + rol8(ans[1] ^ t0[4], t0[2])),
      u8(t0[5] ^ t0[4] + rol8(ans[2] ^ t0[2], t0[8])),
      u8(t0[0] ^ t0[7] + rol8(ans[3] ^ t0[6], t0[9])),
      u8(t0[1] ^ t0[8] + rol8(ans[4] ^ t0[5], t0[4])),
      u8(t0[5] ^ t0[8] + rol8(ans[5] ^ t0[9], t0[3])),
  };
}

EncryptionKey KeyGen1stParty::GenerateTables(const EncryptionKey::RandData& rand,
                                             const EncryptionKey::KeyData& key, u32 idx) const
{
  EncryptionKey result;
  result.GenerateTables(rand, key, idx + 1, 0);
  return result;
}

EncryptionKey KeyGen3rdParty::GenerateTables(const EncryptionKey::RandData& rand,
                                             const EncryptionKey::KeyData& key, u32 idx) const
{
  EncryptionKey result;
  result.GenerateTables(rand, key, idx + 10, 0x30);
  return result;
}

void EncryptionKey::Encrypt(u8* const data, u32 addr, const u32 len) const
{
  for (u32 i = 0; i != len; ++i, ++addr)
    data[i] = (data[i] - ft[addr % 8]) ^ sb[addr % 8];
}

void EncryptionKey::Decrypt(u8* const data, u32 addr, const u32 len) const
{
  for (u32 i = 0; i != len; ++i, ++addr)
    data[i] = (data[i] ^ sb[addr % 8]) + ft[addr % 8];
}

}  // namespace WiimoteEmu
